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A novel and simple structure for improving CMRR is introduced. This structure can be added to the circuits like folded cascode amplifier, telescopic amplifier, current buffers, .etc to improve the CMRR of these circuits. This simple and effective circuit uses common mode deviating technique to improve CMRR at least 12dB while preserves CMRR bandwidth which is a novel technique in order to improve...
A high voltage charge pump design is being presented in this paper. The design is based on Dickson charge pump, constructed with diodes by using AMS 0.35μm technology. The innovation is made in Dickson charge pump i.e. charge control PMOS transistor is used in each stage of charge pump. PMOS transistor is used in series with charging capacitor which reduces the power consumption during the clock transition...
A modified regulated cascode structure having high output swing capability is presented. This structure is used in the implementation of a current mirror. The current mirror possesses wide input and wide output swing capabilities, suitable for low voltage operation. P-SPICE simulations at 0.25 ??m CMOS technology validate the proposed current mirror for currents from 30 nA to 220 ??A, at 1 V with...
A novel on-load tap-changing (OLTC) regulator for electrolytic process is proposed in this paper. The thyristors are used to substitute tap regulating switches. By measuring the voltage and current of power system and the load fluctuation of electrolytic bases, the number of groups of transformerpsilas windings which should turn on or off and the position of tap switches can be obtained. Then according...
A novel semi-physical simulation platform for inverter is proposed. The driving circuit and SPWM bridge are replaced by a low power level circuits of operational amplifier and logic ICs, and DSP controller exactly the same with that for the real system. The semi-physical simulation platform can be used for system-level research, especially for control algorithm design, with equivalent inverter systempsilas...
A novel V/F induction motor control system based on stator voltage oriented method is presented. This scheme includes dead time compensation, stator voltage compensation and anti-oscillation regulation, which can greatly improve the V/F systempsilas performance especially low frequency load capability and fast response capability. Different from conventional V/F methods, all the compensation and regulation...
Summary form only given. Key issues for distributed generation (DG) inclusion in a distribution system include operation, control, protection, harmonics, and transients. This paper analyses two of the main issues: operation and control for DG installation. Inclusion of DG in distribution networks has the potential to adversely affect the control of voltage. Both DG and tap changers aim to improve...
An investigation of the robust stability of a pulse-width modulated buck DC-DC converter is carried out, considering the uncertainty in the components used for the converter circuit. An alternative method which is less conservative than the Kharitonov Theorem (1978) approach is used to find robust stability bounds and to show that the compensated system of the device remains stable when the capacitor...
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